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Chapter 3: AVoption|XL Hardware Overview

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chapter 3

AVoption|XL Hardware Overview

AVoption XL consists of two hardware

components: a Meridien Digital Media

Board that installs in a PCI slot in your

computer, and a Meridien I/O Box that

connects to the card in your computer. A

Video I/O Board, installed in the Meridien

I/O Box, provides video inputs and outputs

from your computer to the rest of your

video equipment.

AVoption XL Hardware

Capabilities

AVoption XL hardware does the following:

• Receives composite, component,

S-video, or (optional) SDI video signal

• Digitizes incoming video

• Compresses digitized video using ad-

vanced JFIF compression

• Outputs composite, component,

S-video, and (optional) SDI video signals

• Captures and plays back uncompressed

video

JFIF Video Compression

The Meridien board captures and plays

back video media in JPEG File Interchange

Format (JFIF). JFIF compression levels pro-

vide variable levels of compression for your

video project, depending on the recording

input selected, except for 1:1, which is un-

compressed. The available JFIF resolutions

are:

• Single ﬁeld – 15:1s, 4:1s, 2:1s

• Two ﬁelds – 20:1, 10:1, 3:1, 2:1, 1:1 (un-

compressed)

✽

Higher JFIF compression ratios require less

storage space but provide lower video resolu-

tion than lower compression ratios.

The lowest JFIF resolution is 15:1s, and the

maximum resolution, 1:1, is uncom-

pressed.

JFIF Compression and Storage

JFIF compression is variable. This means

that JFIF compression levels vary slightly,

depending on the video input selected.

✽

1:1 (uncompressed) video storage levels

are not approximate. The amount of data re-

quired to store 1:1 video is always the same,

regardless of the video input used.

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